Something I think people are forgetting is that not everyone on Jackpoint is a seasoned runner. Some of them have simply done something or other to impress Fastjack. Before the craziness of Emergence, Netcat was a fairly raw runner, but came to Fastjack's attention by being able to dive some tough nodes. Not unlikely that this is what happened with /dev/grrl too. Also, Fastjack has gone out of his way to develop a group of people with a wide range of viewpoints and resources. /dev/grrl provides a window into the corp lifestyle, which just happens to be something that a smart runner would like to keep abreast of, especially if he's going to be infiltrating corp property. And there's also the pop culture angle, another facet that a smart runner should want to know about. And who is more in tune with pop culture than teenagers?